I'm making a concerted effort to try to take my game to the next level. My plans for doing this are playing shorter sessions and fewer hands, but giving each situation much more thought and trying to see what at all I can improve, so I will be posting A LOT of hands in the recent future.... Here's the first of many....

No-Limit Hold'em, $2.00 BB (5 handed) - Hold'em Manager Converter Tool from FlopTurnRiver.com

BB ($377.45)
UTG ($200)
MP ($212)
Hero (Button) ($200)
SB ($208)

Preflop: Hero is Button with A, 2
2 folds, Hero bets $5, SB raises $17, 1 fold, Hero raises $31, SB calls $18

Flop: ($74) 9, 8, K (2 players)
SB checks, Hero bets $20, SB raises $64

Total pot: $114

Villain was getting to the point where he was a bit out of line with his 3bets, particularly in steal spots, therefore I felt this was a good opportunity to 4bet him. Given that he flats the 4bet (relatively quickly) and now c/r my 1/4 pot bet on K98R (a bet I make w/ nearly my entire range here), I can't figure out what he can possibly be repping. My hand looks most like AK, and if he were trying to get value from AK w/ a set, it's a 4bet pot there's no reason to pump the pot, I'm going to be shoving all the money in by the river regardless. If he has a hand like JT why wouldn't he just take the nice pot odds I'm offering him? If he has something like KQ, why wouldn't he just call as he is in a WA/WB so might as well extract value from my bluffs.

I can't think of one hand he does this with as bluff or for value, so I floated the c/r, turn comes 9c and he just jams in for the last $100.

I have no idea what to make of his play, what he reps or what he was thinking. Any ideas ?